SnO/SnO2 Heterojunction Nanoparticles Anchored on Graphene Nanosheets for Lithium Storage

被引:2
作者
Yin, Shujuan [1 ]
Zhang, Xueqian [1 ]
Huang, Xiaoxiao [2 ]
Zhou, Fei [3 ]
Wang, Yishan [1 ]
Wen, Guangwu [1 ]
机构
[1] Shandong Univ Technol, Sch Mat Sci & Engn, Zibo 255000, Peoples R China
[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
[3] Southwest Univ Sci & Technol, Sch Mat & Chem, State Key Lab Environm friendly Energy Mat, Mianyang 621010, Peoples R China
基金
中国博士后科学基金;
关键词
multi-ion channels; interface bonding; SnO/SnO2; heterostructures; graphene nanosheets; lithium-ion batteries; HETEROSTRUCTURES; SNS2;
D O I
10.1021/acsanm.4c01720
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Engineering heterojunction composite structures consisting of multiple nano active components formed from single element is broadly acknowledged as a robust method to boost the electrochemical performance of lithium-ion batteries (LIBs). Herein, a multidimensional composite structure consisting of SnO/SnO2 heterojunction nanoparticles and reduced graphene oxide nanosheets (SnO/SnO2@G) is proposed. The extensive empirical characterization and density functional theory (DFT) calculations validate the plentiful heterogeneous interfaces and resilient lithium storage mechanism exhibited by the SnO/SnO2 heterostructures. These attributes are closely associated with the rapid diffusion kinetics of Li+ within the space charge region and the presence of multiple-ion channels. On the other hand, the Sn-O-C bond is anchored on graphene sheets, enhancing SnO/SnO2 heterostructure stability and preventing unavoidable aggregation and slow charge transfer. As anticipated, the better specific capacity, rate performance, and cycling stability (498.69 mAh g(-1) at 1.0 A g(-1) after 400 cycles) are acquired in the LIBs composed of a SnO/SnO2@G anode. This work provides a feasible approach for improving the performance of LIBs by constructing single-element heterostructures.
引用
收藏
页码:14419 / 14430
页数:12
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